How to Run Android Apps Inside Chrome on Any Desktop Operating System
ARC: The App Runtime for Chrome (or ARC) is the piece of software that allows Android apps to run in Chrome. In the same way that ART (and the older Dalvik) currently run Android apps in Android itself. By making a modified version of the Android runtime for Chrome, Google can allow developers to add support for Chrome without rebuilding their apps from the ground up.
About App Runtime for Chrome (Beta) - Chromebook Help